36781332531 has 4 divisors (see below), whose sum is σ = 49041776712. Its totient is φ = 24520888352.

The previous prime is 36781332529. The next prime is 36781332541. The reversal of 36781332531 is 13523318763.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 36781332531 - 2¹ = 36781332529 is a prime.

It is a super-2 number, since 2×36781332531² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (36781332541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6130222086 + ... + 6130222091.

It is an arithmetic number, because the mean of its divisors is an integer number (12260444178).

Almost surely, 2^36781332531 is an apocalyptic number.

36781332531 is a deficient number, since it is larger than the sum of its proper divisors (12260444181).

36781332531 is a wasteful number, since it uses less digits than its factorization.

36781332531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12260444180.

The product of its digits is 272160, while the sum is 42.

The spelling of 36781332531 in words is "thirty-six billion, seven hundred eighty-one million, three hundred thirty-two thousand, five hundred thirty-one".